Abstract
Currently the visualization of cartilage and joints in NMR imaging is not possible because of their short T2 relaxation processes. Furthermore 3D images are required to provide visualization of the non-planar morphology of joints. Comparing the two principal 3D-MR imaging methods, Projection Reconstruction (3D-PR) and Fourier Imaging (3D-FT), the latter is superior regarding two aspects: (i) sensitivity to measurement and image artefacts and (ii) reconstruction time. But Fourier Imaging can’t cope with the problem of short T2 relaxation processes due to the intrinsic magnetic field gradient switching times. Projection reconstruction image acquisition does not depend on this switching times and thus allows the visualization of cartilage and joints. However, the drawback of 3D-PR is the enormous computing effort needed for reconstruction.
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